文献类型：期刊文献

英文题名：Experimental study and application of manufactured sand self-compacting concrete in concrete-filled-steel-tube arch bridge: A case study

作者：Hou, Wen-Qi Yang, Jia-Jun Zhang, Zheng-Xin Yuan, Xiao-Qian

第一作者：Hou, Wen-Qi

通信作者：Zhang, ZX[1]

机构：[1]Cent South Univ, Sch Civil Engn, Changsha 410075, Peoples R China;[2]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China

第一机构：Cent South Univ, Sch Civil Engn, Changsha 410075, Peoples R China

通信机构：corresponding author), Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China.|贵州理工学院土木工程学院;贵州理工学院;

年份：2021

卷号：15

外文期刊名：CASE STUDIES IN CONSTRUCTION MATERIALS

收录：;EI(收录号：20214010973402);Scopus(收录号：2-s2.0-85116045262);WOS:【SCI-EXPANDED(收录号:WOS:000708127900001)】；

基金：This work was supported by Scientific research project of Guizhou Provincial Department of Transportation (Grant number: 2015-122-043) ; National Natural Science Foundation of China (Grant number: 51208513) . These supports are gratefully acknowledged.

语种：英文

外文关键词：Self-compacting concrete; Manufactured sand; CFST arch bridge; Mixture proportion test; Field full-scale simulation test

摘要：Utilizing manufactured sand (MS) with high content of stone dust, mix proportion tests were carried to investigate the influence factors of preparing self-compacting concrete (SCC) with good performance. Results showed that, with the stone dust content no more than 9% and the addition of expansion agent not exceed 10%, the prepared MS-SCC has no slump loss within 4 h for the fresh status and have compressive strength over 55 MPa for the harden status. To further verify the workability of the prepared MS-SCC for the "filling down and pumping up" concrete pouring method, field full-scale filling simulation test was carried out. Results showed that the prepared MS-SCC performed well in construction workability, which could pass through the headed studs and internal stiffening plates in the semi-open tube segment smoothly. All the above results have been successfully applied on both the Zongxi River Bridge and the Xianghuoyan Bridge, which are two similar concrete-filled-steel-tube (CFST)arch bridge located adjacent in mountainous areas with poor engineering conditions. Therefore, although the research results of this paper have certain particularity, they are still valuable to form application guidelines of MS-SCC with high stone dust content in the mountainous areas of southwest China.